DE102009052995A1 - Halogen lamp, has illuminating body supported by retaining wire, where measure for reducing heat dissipation is provided in region of retaining wire and/or part of illuminating body that contacts retaining wire - Google Patents

Abstract

The lamp (1) has an illuminating body (4) axially guided in a bulb (2) and comprising two ends. The bulb comprises a halogen contained part, and the illuminating body is supported by a retaining wire (8). A measure for reducing heat dissipation is provided in a region of the retaining wire and/or a part of the illuminating body that contacts the retaining wire. The measure is an extension of linear length of the retaining wire. The retaining wire is designed as a hollow wire and coated with an insulating material whose thermal conductivity is smaller than that of tungsten or molybdenum.

Description

Technical area

The Invention is based on a halogen incandescent lamp according to the The preamble of claim 1. Such halogen lamps are especially for operation on mains voltage, so high voltage or medium voltage (HV / MV) with typically 80 to 250 V, thought.

State of the art

The DE-A 197 01 792 discloses a halogen incandescent lamp in which, for the mains voltage application, the burner is crimped on one side. The luminous element is arranged centrally in the burner and supported by means of a frame. The piston is IRC-coated and elliptical in shape. For medium-voltage lamps with about 100 to 130 V, this concept already leads to a wire length of the W-wire for the luminaire of 50 cm. This length can barely be accommodated with standard techniques in the piston. However, when used with typically 220 to 250V HV lamps, the wire must be about twice as long and can not be safely and reliably held in the axis of the piston by standard techniques.

So far There are only two-sided Sockittenlampen for HV with IRC coating. These use special spiral holders, which are not applicable to one-sided solutions.

From the US 3,188,513 a coated incandescent lamp is known, are attached to the helical holder by means of a glass bead to a long power supply.

Presentation of the invention

The The object of the present invention is a mounting technique for a luminous element in a halogen incandescent lamp, which is operated with mains voltage, which provide a permanent central arrangement of the luminaire ensures without significantly worsen efficiency.

These Task is solved by the characterizing features of claim 1.

Especially advantageous embodiments can be found in the dependent Claims.

in principle For example, the present invention is for single ended sockets Halogen lamps with mains voltage applicable, with preference the application is intended for HV, but the application at MV is not excluded. In this case, the piston is in particular with IRC coated and has retroreflective properties on. For this he is for example elliptical, cylindrical or after Formed like a barrel body, the luminous body positioned in the central axis to the back-reflected To absorb radiation.

According to the invention a bracket wire or rack holder is used, which is the centering of the filament in the axis as well as possible ensures, without, however, the efficiency of the lamp worth mentioning to worsen.

Essential for that is that the heat dissipation of the support wire is reduced as well as possible. Are suitable for this several measures alone or in combination.

Prefers the piston is coated with IRC. The centering is by a Fixation of the frame in the exhaust tube further favored. In order not to destabilize the centering, it is advantageous the filament with the self-centering coil holders to be welded by laser. The centering will be additional ensured by several rack holders. This reduces the Helical sag during the life of the lamp. Prefers The lamp also uses a quartz bar integrated in the pinch to the orientation of the filament at the pinch ensure and still keep the length short.

All in all results in a high-precision-oriented halogen incandescent lamp, with the highest efficiency, even with a long service life preserved.

For example, the diameter of the wire for the luminaire at 230 V / 25 W only 18 microns with a primary winding diameter of 70 microns and the diameter of the wire for the luminaire at 230 V / 75 W only 36 μm with a primary winding diameter of 150 μm. the coil 10 on the frame is based on a diameter of the wire of 250 microns and the inner diameter of the coil itself is 800 microns. Thus, the position of the end of the filament without aids within the frame wrap can move much. It is only fixed by an intermediate piece. Use of a coiled Ta wire as an intermediate piece, for example, has the advantage that this intermediate piece melts faster than the W wire and can additionally act as a getter. The Ta single winding typically has a wire diameter of 150 μm and an outer diameter of its winding of 700 μm. such a striking size difference between the end of the filament and the frame winding occurs especially in HV lamp types, where the difference depending on Wattage up to a factor of 10 and can make more.

When effective getter turned out especially Ta, Zr, and Nb. A weaker getter effect has Re.

at thicker tungsten filaments is plugging a final winding of the Illuminant on a bent end of the frame preferred. Typically, the diameters are for the frame wires 0.1 mm to 0.4 mm. At medium and higher power levels (230 V 40 W to 230 V 1000 W) are the secondary winding diameters (Secondary core wire diameter)> 0.1 mm to 1.0 mm.

Particularly effective here are in particular even triple helices, which are theoretically known, but in this context have never been used, see US-A 4,283,653 ,

there is the luminous body axially centered in the piston and is held by a short and a long power supply.

In a specific embodiment is at least one, preferred Both, power supply lines have a frame winding their end, which receives the end of the filament. The frame winding is usually simply wrapped, as the Wire diameter of the frame is relatively thick (typically 0.2 to 0.3 mm). Here are the short and long power supply typically of tungsten, or of molybdenum or other materials with melting point> 1000 ° C exist. The end of the The filament can be a piece of wire, or be a wrapped end region. This is a simple winding or possibly a double winding applicable.

Of the Illuminant is in one embodiment a cc helix whose end is simply wrapped. This End area is chosen in the frame winding whose dimensions are that the end portion fits into the winding introduced and there welded by laser. A second embodiment is a ccc helix whose end is a cc helix.

• (1) Verlängerung der wärmeabführenden Strecke. Je länger die Wärmeabführende Strecke, desto niedriger der Temperaturgradient und desto weniger Wärme pro Zeiteinheit fließt ab.
• (2) Verringerung des Querschnitts des Wendelhalters. Es wird um so weniger Wärme abgeführt, je geringer der wärmeleitende Querschnitt ist.
• (3) Verwendung von Materialien, welche eine geringere Wärmeleitfähigkeit aufweisen.
• (4) Verringerung der Temperatur am Berührpunkt des Wendelhalters. diese geschieht entweder durch eine sehr wei te gefasste schleife, di nicht unbedingt am Leuchtkörper anliegt, sondern nur in speziellen der Stützung bedürfenden Brennlagen, oder generell durch spezielle Gestaltung des Leuchtkörpers, beispielsweise indem eine cc-Wendel oder ccc-Wendel an diesem Punkt geringfügig zum Einfachgewickel bzw. zur cc-Wendel ausgezogen wird.

From the transport equation for the heat conduction there are measures by which the heat removal via a coil holder can be reduced:

• (1) Extension of the heat-dissipating route. The longer the heat dissipating distance, the lower the temperature gradient and the less heat per unit time flows.
• (2) reduction of the cross section of the helical holder. The less heat is dissipated, the less heat is dissipated.
• (3) Use of materials which have lower heat conductivity.
• (4) Reduction of the temperature at the contact point of the coil holder. this is done either by a very white te gefaßt loop, which is not necessarily applied to the luminous body, but only in special supporting the need of burning layers, or generally by special design of the filament, for example by a cc helix or ccc helix at this point slightly to Single wound or pulled out to the cc-helix.

• (5) Verringerung der Wärmeabstrahlung vom Halter bzw. vom gehalterten Teil der Wendel über den Halter.

At least with heavily loaded lamps, a significant portion of the dissipated heat is radiated from the holder. If this contribution is eliminated or minimized in the energy balance, the holder removes less heat from the coil due to heat conduction:

• (5) Reduction of heat radiation from the holder or held part of the coil over the holder.

concrete Realizations of this rudimentary consideration are:

Embodiments to point (1):

The holder can be designed as a helical spiral (shape of a filament or spring). There by the temperature gradient can be greatly reduced along the holder (in particular more than halved), resulting in a significant reduction of the heat dissipated. Due to the comparatively large mass of the holder, a relatively large amount of heat is stored in it. Although this can lead to the end value for the luminous flux being reached somewhat more slowly when the lamp is put into operation, because at the start of the lamp more heat is initially drawn out of the filament. However, in the steady state, the holder of the coil withdraws less energy. Too large, the Spi rale must not be wound, otherwise too much light is shadowed.

Exemplary embodiments of (2):

For this It is proposed that the coil holder of two parts with different Diameters exists. The first part of the owner is a common one Wire and has a usual diameter of about 0.2-0.3 mm and consists of molybdenum or tungsten, while the front, the spiral touching part. The one with retaining eyelet is equipped, only from an extreme thin tungsten or molybdenum "snare" or also other refractory materials or alloys, eg. B. Re, Ta, Hf, with a diameter of the wire of at most 0.1 mm. In extreme cases, the sling pulled as far be that the noose moves into the cc or ccc-Gewickel and there includes only the simple winding. The loop may possibly still be twisted. The advantage of this version is also that when the burning position is sagging the helix in the axial direction prevents and thus a change in the spiral pitches is minimized.

Possible is also the direct laser welding or clamping the Spiral with a very short and very thin spiral holder adapter with a diameter of 0.05 to 0.1 mm instead of a comprehensive one thick eyelet, a hook, ring, etc.

One Another embodiment is that the holder consists of a Hollow wire consists, as known per se, see PCT application P / EP2007 / 055,913th The for the fulfillment of the wire necessary mechanical stability z. B. opposite A bend or bend originates here above all the off-axis Components of the holder (these contribute more to the bending moment as constituents near the axis). By reducing the Cross-section, the heat dissipation decreases over the holder.

Exemplary embodiments of (3):

• – Geringere Wärmeleitfähigkeit als W oder Mo;
• – Der Schmelzpunkt sollte deutlich größer sein als typische Temperaturen am Wendelhalter;
• – Der Dampfdruck sollte bei typischen Temperaturen am Halter hinreichend klein sein, um ein zu schnelles Abdampfen zu verhindern.
• – Bei einer Beschichtung darf das Beschichtungsmaterial nicht mit dem Grundmaterial des Halters oder der Gasfüllung reagieren.
• – Wenn der komplette Halter aus dem Material gefertigt wird, muss zusätzlich eine hinreichende mechanische Festigkeit bzw. geringe Bruchanfälligkeit gefordert werden.

The spiral-stabilizing metal eyelet or hook (usually made of W or Mo) is coated with a poorly heat-conductive material, or even a larger part or the entire eyelet or the holder itself can be made of this material. Requirements for the material:

• - lower thermal conductivity than W or Mo;
• - The melting point should be significantly greater than typical temperatures at the coil holder;
• - The vapor pressure should be sufficiently small at typical temperatures on the holder to prevent too rapid evaporation.
• - For a coating, the coating material must not react with the base material of the holder or the gas filling.
• - If the complete holder is made of the material, a sufficient mechanical strength or low susceptibility to breakage must additionally be required.

As a guide, some concrete materials are summarized in Tab. 1. Tab. 1 material melting point Thermal conductivity in [Wcm - 1 K - 1] in the range 0 ° C - 100 ° C as a guide SiO2 Approximately 1728 ° C 0,013 VYCOR 0.0125 Borate glass 0.00625 Borosilicate glass 0.0091 TiO2 Approximately 1850 ° C 0,065 Al2O3 2015 ° C 0,302 ZrO2 2715 ° C 0.0194 MgO 2852 ° C 0.36 HfO2 2812 ° C Y2O3 2410 ° C La2O3 Approximately 2300 ° C Ce.sub.2O.sub.3 SrO Approximately 2400 ° C TaC 3880 ° C 0.222 ZrC 3030 ° C 0,205 TiC 3160 ° C 0,205 tab2 3000 ° C 0.109 ZrB2 2680 ° C 0.121 TaN 3090 ° C ZrN 2980 ° C BC 2540 ° C 0.21 BN 2730 ° C W 3410 ° C 1.82 Mn 1244 ° C 0.206 Pt 1772 ° C 0.734 re 3180 ° C 0.486 os 3045 ° C Ta 2996 ° C 0.579 boron 2297 ° C 0,318 Ti 1660 ° C 0.224 diamond Phase transformation in graphite 9.4 to 15.2 pyrolytic graphite Parallel: 21.3; Vertical: 0.0636

Exemplary embodiments of (3a):

Of the Holder consists of a tungsten wire (diameter 0.2-0.3 mm) enclosing a tube of ZrO2. The tube made of ZrO2 surrounds the filament and thus fixes it at the breakpoint. The oxygen partial pressure over ZrO2 is very low, it reaches about 0.01 mbar at 2750 K. In addition, ZrO2 thermodynamically more stable than tungsten, d. H. the oxygen remains assigned to the Zr and there are no tungsten oxides.

Exemplary embodiments of (3b):

MgO is far less suitable, already at 2400 K is the Oxygen partial pressure 0.3 mbar. In addition, the tungsten oxides are more stable as magnesium oxide.

Exemplary embodiments of (3c):

Of the Tungsten holder is coated with HfO2. The oxygen-vapor pressure over The HfO2 at 2600 K is about 0.002 mbar. He then rises to higher temperatures, however, massive. HfO2 reacts not with tungsten.

Possible is also that, instead of using a massive ZrO2 holder or a ZrO2 coating of a tungsten retainer eyelet the front eyelet of a 2-piece Zr-tungsten holder made of Zr wire sheet metal and then selectively oxidized to ZrO 2.

Also the coating with SiO2 or Al2O3 is possible.

Embodiment (3d):

coating the helical holder with metal nitrides or Metallboriden such. B. TaN, ZrN etc.

Exemplary embodiment (3e):

Instead of the metal eyelet I metal hooks of Mo or W can Replacement materials made of quartz glass (SiO2) are also used (ring shape or two opposite bars with notches for the helix). The glass rings or the notched glass holders will be back over wires or over an extension of the glass piece on the quartz beam held.

Instead of attaching the electrically and thermally insulating glass / ceramic Wendelhaltes on quartz beam and the "shorter distance" can be performed directly across the coil holder based on US-A 3,188,513 . 3 , The advantage of this shorter spiral holder length is less shading effect due to the spiral holder made of pure glass / ceramic. Advantage: Holder is already electrically insulating anyway.

Embodiment (3f):

Instead of The metal eyelet made of Mo or W can also substitute materials made of quartz glass or ZrO2 are used (ring shape or 1 or 2 opposite bars with notches for the helix). If in contact with the hot filament oxides should come out of the glass or the ceramic, can be the glass ring / ceramic ring (ZrO2 / SiO2) or the notched glass / ceramic rod with a thin surface coating of tungsten be provided to the direct contact of the tungsten filament with the To prevent oxide material.

Exemplary embodiment: (3 g)

Instead of The short quartz glass ring can also be a complete cylindrical open quartz glass tube (diameter <3mm) placed in the center of the flask become. The maximum length can be almost even in extreme cases the length of the helix amount. The cylindrical glass tube is about one to three molybdenum / tungsten holder held on the quartz beam or on the long electrode.

Exemplary embodiments of (4)

Instead of to attach the coil holders to the cc secondary coil, The coil can also be pulled out or the interruption already with be wrapped and so with the holder only the primary wrap be included.

Exemplary embodiments of (5):

coating of the holder with materials with low emission coefficient in the long-wave IR, or use of a coated glass tube, so that less heat is radiated.

As a general rule It is true that at the temperatures characteristic of the coil holder up to 2000 ° C (near the point of contact with the helix) the emission of radiation plays an important role. Much of the spirals delivered to the holder Power is radiated from the surface of the holder; naturally mainly in inf raroten Radiation range. The helix is deprived of less power when the radiation from the coil holder is reduced. Mechanistically performs such a reduction of radiation from the coil holder to an increase in the temperature of the helical holder, and thus reducing the temperature gradient between helix and holder. This leads to a reduction in power transmission from the helix to the holder.

• – gegenüber den Ausgangsmaterialen Wolfram oder Molybdän eine verringerte integrale (d. h. über den gesamten Spektralbereich bewertete) Emission im fraglichen Temperaturbereich (d. h. insbesondere 1500°C–2000°C) aufweisen.
• – im fraglichen Temperaturbereich thermisch stabil sind, also nicht schmelzen, oder schnell abdampfen.
• – auf dem Substrat stabil sind, also nicht bzw. nur sehr langsam mit ihm reagieren, bzw. eindiffundieren.
• – nicht störend in die Gasphasenchemie eingreifen, etwa durch Entzug des Halogenzusatzes.

For the coating of the holder from this point of view materials come into question, the

• - Compared to the starting materials tungsten or molybdenum a reduced integral (ie evaluated over the entire spectral range) emission in the temperature range in question (ie in particular 1500 ° C-2000 ° C) have.
• - are thermally stable in the temperature range in question, so do not melt, or evaporate quickly.
• - Are stable on the substrate, so not or only very slowly react with him, or diffuse.
• - Do not interfere with the gas phase chemistry, for example by removal of the halogen additive.

• – Beschichtung des Wendelhalters mit Nitriden, z. B. Titannitrid, Zirkoniumnitrid oder Hafniumnitrid.
• – Beschichtung des Carbiden, z. B. Tantalcarbid, Hafniumcarbid.
• – Beschichtung des Wendelhalters mit Boriden, insbesondere Hexaboriden wie z. B. LaB6.

Depending on the application (ie temperature in operation, composition of the gas phase in the flask, taking into account the halogen-containing filling), the following options are given:

• - Coating of the helical holder with nitrides, z. As titanium nitride, zirconium nitride or hafnium nitride.
• - Coating of the carbide, z. Tantalum carbide, hafnium carbide.
• - Coating the helical holder with borides, in particular hexaborides such. B. LaB6.

Other Alternatives or additives are oxidic materials that are still stable at the temperatures in question, z. HfO2, ZrO2. Other alternatives or additives are alloys of Materials according to the above variants (1) - (4), z. B. two carbides or a carbide with a nitride, etc.

• – Dotierte Materialen aus den Gruppen (1)–(5), z. B. Hf(1 – x)W × O2, mit elektronegativen Elementen wie Halogenen dotiertes HfO2, usw.
• – Gebrauch einer das IR reflektierenden oxidischen Interferenzbeschichtung, z. B. aus TaO2, SiO2. Diese Option kommt nur für Bereiche des Halters in Frage, die sich bei Temperaturen deutlich unterhalb 2000°C befinden.
• – Beschichtung der kälteren Bereiche des Halters mit ITO.

Other alternatives or additional design options are:

• - Doped materials from the groups (1) - (5), z. Hf (1-x) W × O2, HfO2 doped with electronegative elements such as halogens, etc.
• Use of an IR reflective oxide interference coating, e.g. B. TaO2, SiO2. This option is only suitable for areas of the holder that are at temperatures well below 2000 ° C.
• Coating the colder areas of the holder with ITO.

Of the Holder can also be surrounded by a quartz tube, on whose An IR or all radiation surface reflective coating is located. The coating may, for. B. consist of one of the above substances. The distance must be between the outer surface of the holder and the glass tube be so large that the heat transfer over the gas phase from the holder to the glass tube is negligible.

Brief description of the drawings

in the The invention is based on several embodiments be explained in more detail. The figures show:

1 a halogen incandescent lamp with IRC layer in HV technology;

2 in enlargement, the detail of the holder of the filament by a retaining wire;

3 a retaining wire of partially reduced diameter;

4 a retaining wire with coating;

5 a retaining wire with coiled structure.

Preferred embodiment the invention

1 schematically shows a novel halogen incandescent lamp 1 for mains voltage of 230 V. The halogen bulb 1 has an elliptically shaped piston 2 , the outside with IRC as known, beschich tet ( 3 ). A coiled filament 4 sits in the lamp axis. The piston 2 is filled with halogen-containing filling as known per se.

A frame 5 for holding the filament has a short power supply 6 on and one guided along the filament long power supply 7 , Both are made of tungsten, but in principle Mo can also be used. Next, the frame still has three central coil holder 8th on, which are also performed parallel to the filament. The three spiral holders 8th each support a central region of the filament by looping like ( 10 ) are wrapped around the filament, see detail 2 ,

The end of the power supply lines 6 and 7 is in each case to a frame winding 10 shaped. This is arranged in the axis of the lamp. The short power supply 6 is angled for about 90 °. The long power supply is initially in the pumping stem 11 loosely anchored, the free end 12 is then returned and also angled at about 90 °. The frame winding 10 Each is simply coiled and its inner diameter is significantly larger than the outer diameter of the end of the filament. The end 13 the filament is either a piece of wire or simply coiled while the filament itself is simply (sc) or twofold (cc). The end 13 of the filament is in the frame winding 10 introduced and anchored there by means of laser welding. Concretely, the end of the luminous element is, for example, a single wound.

Preference is given to a single retaining wire 8th used, because then the problem of heat dissipation occurs only once. Preferably, this single retaining wire is arranged on the side of the filament on which the long power supply is located, because then virtually no additional shading occurs, which would otherwise adversely affect the efficiency.

3 shows a retaining wire 8th its first part 11 has a relatively large diameter and its afflicted with the eyelet part 12 has a relatively small diameter. The two parts are made of different materials, in particular, the first part of a first metal and the second part 12 from a second metal. Basically, however, the first part 11 made of quartz glass or ceramic, here preferably made of ZrO2. It can part 11 a rod or be hollow. The second part here is a metal wire, advantageously of W or Mo. However, it is also possible that the conditions are exactly the opposite: the first part is a metallic part, rod or hollow cylinder, while the second part is a rod made of quartz glass or ceramic , He may have a notch in the direction of the luminous body for fixing a non-luminous section. In principle, a holding part made of quartz glass or ceramic can be heat-insulating and / or vapor-preventing coated. SiO 2 or ZrO 2 is particularly suitable as an insulating layer. In particular, a layer of W. acts as a vapor-preventing agent. Both types of layers can also be used at the same time, it being understood that the evaporation-preventing layer is externally applied. A retaining wire can be fused to an insulating tube / rod or end in a loop that is applied to the tube / rod. The retaining wire may in particular also be a tube made of ceramic, which is angled at 90 ° and fixed in a quartz beam as a fixation. Facing the filament, it has a notch or furrow. The insulating tube / rod can also be connected directly to the long power supply 7 be attached, for example by melting the end. The front furrow can also be fused with a non-luminous portion of the filament to better fix the filament.

4 shows a retaining wire 8th in which the portion angled to the filament 16 with a heat dissipation reducing material 17 coated in accordance with Tab. 1.

5 shows a retaining wire 8th , at a section 20 is widened to extend the overall length of the retaining wire.

• 1. Halogenglühlampe, insbesondere für Netzspannung, mit einem eine Längsachse definierenden Kolben, in dem ein Leuchtkörper axial geführt ist, wobei der Leuchtkörper zwei Enden besitzt, die jeweils mit einem Gestellteil verbunden sind, wobei der Kolben eine halogenhaltige Füllung beinhaltet, wobei der Leuchtkörper durch mindestens einen Haltedraht zusätzlich unterstützt ist, dadurch gekennzeichnet, dass mindestens eine die Wärmeableitung reduzierende Maßnahme im Bereich des Haltedrahts und/oder des Teils des Leuchtkörpers, der mit dem Haltedraht in Berührung kommen kann, realisiert ist.
• 2. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme eine Verlängerung der linearen Länge des Haltedrahts durch Verwendung mindestens eines gewendelten Abschnitts des Haltedrahts ist.
• 3. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme eine Verringerung des Durchmessers des Haltedrahts in einem Abschnitt des Haltedrahts ist.
• 4. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme die Wahl eines Material mit relativ geringer Wärmeleitfähigkeit für zumindest einen Abschnitt des Haltedrahts ist.
• 5. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme eine Verringerung der Temperatur des berührenden Teils des Leuchtkörpers ist, indem dieser abschnittsweise weniger stark gewendelt und insbesondere ungewendelt ist.
• 6. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme darin besteht, dass der Haltedraht eine Öse besitzt, die den Leuchtkörper umfasst, wobei der Durchmesser der Öse so groß gewählt ist, dass der Leuchtkörper die Öse nicht zwingend berührt, insbesondere ist der Innendurchmesser der Öse mindestens eineinhalb so groß wie der Außendurchmesser des Leuchtkörpers.
• 7. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme darin besteht, dass der Haltedraht zumindest abschnittsweise ein Hohldraht oder Hohlzylinder aus isolierendem Material ist.
• 8. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme darin besteht, dass der Haltedraht zumindest im Bereich der potentiellen Berührfläche mit dem Leuchtkörper mit einem schlecht wärmeleitenden Material beschichtet ist, dessen Wärmeleitfähigkeit kleiner als die von W oder Mo ist.
• 9. Halogenglühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Maßnahme darin besteht, dass der Haltedraht aus mindestens zwei Teilen mit unterschiedlichem Material und unterschiedlicher Wärmeleitfähigkeit aufgebaut ist.

Essential features of the invention in the form of a numbered list are:

• 1. halogen incandescent lamp, in particular for mains voltage, having a longitudinal axis defining piston in which a luminous body is axially guided, wherein the luminous body has two ends which are each connected to a frame part, wherein the piston includes a halogen-containing filling, wherein the luminous body At least one retaining wire is additionally supported, characterized in that at least one heat dissipation reducing measure in the region of the holding wire and / or the part of the filament, which can come into contact with the holding wire, is realized.
• 2. Halogen incandescent lamp according to claim 1, characterized in that the measure is an extension of the linear length of the holding wire by using at least one coiled portion of the holding wire.
• 3. Halogen incandescent lamp according to claim 1, characterized in that the measure a reduction the diameter of the retaining wire is in a portion of the retaining wire.
• 4. Halogen incandescent lamp according to claim 1, characterized in that the measure is the choice of a material with relatively low thermal conductivity for at least a portion of the retaining wire.
• 5. Halogen incandescent lamp according to claim 1, characterized in that the measure is a reduction in the temperature of the contacting part of the luminous element by these sections is less coiled and in particular gewendelt.
• 6. Halogen incandescent lamp according to claim 1, characterized in that the measure consists in that the retaining wire has an eyelet, which comprises the luminous element, wherein the diameter of the eyelet is chosen so large that the luminous element does not necessarily touch the eyelet, in particular is the Inner diameter of the eyelet at least one and a half as large as the outer diameter of the filament.
• 7. Halogen incandescent lamp according to claim 1, characterized in that the measure consists in that the retaining wire is at least partially a hollow wire or hollow cylinder made of insulating material.
• 8. Halogen incandescent lamp according to claim 1, characterized in that the measure consists in that the retaining wire is coated at least in the region of the potential contact surface with the luminous body with a poorly heat-conductive material whose thermal conductivity is smaller than that of W or Mo.
• 9. Halogen incandescent lamp according to claim 1, characterized in that the measure consists in that the retaining wire is constructed of at least two parts with different material and different thermal conductivity.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19701792 A [0002]
• - US 3,188,513 [0004]
• - US 4283653A [0016]
• US Pat. No. 3,188,513 A [0036]

Claims (9)

Halogen incandescent lamp, in particular for mains voltage, with a longitudinal axis defining a piston in which a luminous body is axially guided, wherein the luminous body has two ends which are each connected to a frame part, wherein the piston includes a halogen-containing filling, wherein the luminous element by at least one Supporting wire is additionally supported, characterized in that at least one heat dissipation reducing measure in the region of the holding wire and / or the part of the filament, which can come into contact with the retaining wire, is realized. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is an extension of linear length of the holding wire by using at least a coiled portion of the retaining wire is. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is a reduction of Diameter of the retaining wire in a section of the retaining wire is. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is the choice of a material with relatively low thermal conductivity for is at least a portion of the retaining wire. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is a reduction in temperature of the contacting part of the luminous body is by these sections less coiled and in particular is undulating. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is that the Holding wire has an eyelet, which is the filament includes, wherein the diameter of the eyelet so large is that the filament does not force the eyelet touched, in particular, the inner diameter of the eyelet at least one and a half as large as the outer diameter of the filament. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is that the Retaining wire at least partially a hollow wire or hollow cylinder made of insulating material. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is that the Holding wire at least in the area of the potential contact surface with the filament with a poorly heat-conducting Material is coated, its thermal conductivity smaller than that of W or Mo is. Halogen incandescent lamp according to claim 1, characterized characterized in that the measure is that the Retaining wire of at least two parts with different material and different thermal conductivity built is.